Need to decode, don't have key

Question

So my friend gave me this monster of a code but I dont know WHAT it is and they said it can be solved as is ... I've been working on it for a week and its making me mad. Got any ideas?

GAYDCMJRGAYDCIBQGAYTCMBRGAYSAMBQGEYTCMBQGEQDAMBRGEYTAMBREAYDAMJRGAYTCMJAGAYDCMJRGAYDCIBQGAYTCMBRGAYSAMBQGEYTAMJRGEQDAMBRGEYDAMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGAYCAMBQGEYTAMJRGEQDAMBRGEYDCMBQEAYDAMJRGAYDAMJAGAYDCMJQGEYTCIBQGAYTCMBRGEYCAMBQGEYTAMJQGAQDAMBRGEYTAMBQEAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDAMBQEAYDAMJRGEYDAMJAGAYDCMJQGEYDAIBQGAYTCMBRGAYSAMBQGEYTAMBQGEQDAMBRGEYDCMJQEAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDAMBQEAYDAMJRGEYDAMJAGAYDCMJQGEYDAIBQGAYTCMBRGAYSAMBQGEYTAMBQGEQDAMBRGEYDAMJQEAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDAMJREAYDAMJRGAYTAMJAGAYDCMJQGEYTAIBQGAYTCMJQGAYCAMBQGEYTCMBQGEQDAMBRGEYDCMJQEAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGEYCAMBQGEYTAMJQGEQDAMBRGEYDAMJREAYDAMJRGAYDAMBAGAYDCMJQGEYTCIBQGAYTCMBRGAYCAMBQGEYTAMBRGAQDAMBRGEYDCMBQEAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMJQGAYSAMBQGEYTAMBRGAQDAMBRGEYDCMJQEAYDAMJRGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBRGAYSAMBQGEYTAMJRGAQDAMBRGEYDCMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDCIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYDAMBQEAYDAMJRGAYTCMJAGAYDCMJRGAYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGEQDAMBRGEYDAMBQEAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGEYCAMBQGEYTAMJQGAQDAMBRGEYDAMBREAYDAMJRGEYDAMJAGAYDCMJQGEYDAIBQGAYTCMBQGEYSAMBQGEYTAMJQGEQDAMBRGEYTAMBREAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDAMBQEAYDAMJRGEYDAMJAGAYDCMJQGEYDAIBQGAYTCMBRGEYSAMBQGEYTAMJRGEQDAMBRGEYDAMJQEAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDCMJQEAYDAMJRGAYDCMBAGAYDCMJQGAYDCIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYTAMBQEAYDAMJQGAYDAMBAGAYDCMJRGAYDCIBQGAYTCMBQGEYCAMBQGEYTAMJRGAQDAMBRGEYDAMBQEAYDAMJRGAYDCMJAGAYDCMJQGAYDCIBQGAYTCMJQGAYSAMBQGEYTAMBRGAQDAMBRGEYDAMBREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGEYCAMBQGEYTAMJQGEQDAMBRGEYDAMJREAYDAMJRGAYTCMBAGAYDCMJRGAYDAIBQGAYTCMBRGEYCAMBQGEYTAMBRGAQDAMBRGEYDCMBREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGEYCAMBQGEYTAMJQGEQDAMBRGEYDCMBQEAYDAMJRGAYDCMJAGAYDCMJQGEYDAIBQGAYTCMBQGAYSAMBQGEYTAMJRGAQDAMBRGEYDAMBREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYDCMBQEAYDAMJRGAYTCMBAGAYDCMJQGAYDAIBQGAYTCMBQGEYSAMBQGEYTAMBRGEQDAMBRGEYDCMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGEYCAMBQGEYTAMJQGEQDAMBRGEYDAMJQEAYDAMJRGAYDCMJAGAYDCMJQGEYTCIBQGAYTCMBRGAYSAMBQGEYTAMJQGEQDAMBRGEYDAMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYTAMBREAYDAMJRGEYDAMBAGAYDCMJQGEYDAIBQGAYTCMBRGEYCAMBQGEYTAMBRGAQDAMBRGEYDCMBREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGEYCAMBQGEYTAMJQGEQDAMBRGEYDCMBQEAYDAMJRGEYDAMJAGAYDCMJRGAYDCIBQGAYTCMBRGEYSAMBQGEYTAMBQGAQDAMBRGEYDAMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDCIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYDAMBQEAYDAMJRGAYTCMJAGAYDCMJRGAYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYTAMBQEAYDAMJQGAYDAMBAGAYDCMJRGAYDCIBQGAYTCMBRGAYSAMBQGEYTCMBQGAQDAMBRGEYDCMBQEAYDAMJRGAYDAMJAGAYDCMJQGAYTAIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYDAMJREAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDAMBQEAYDAMJRGEYDAMJAGAYDCMJQGEYDAIBQGAYTCMBRGEYSAMBQGEYTAMJRGEQDAMBRGEYDCMBREAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDCMBQEAYDAMJRGEYDAMBAGAYDCMJRGAYDCIBQGAYTCMBQGEYCAMBQGEYTAMJQGAQDAMBRGEYTAMBQEAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMJQGAYSAMBQGEYTAMBRGAQDAMBRGEYDAMJREAYDAMJRGAYTAMBAGAYDCMJQGEYTAIBQGAYTCMBRGAYCAMBQGEYTAMBQGEQDAMBRGEYDCMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYDCMBQEAYDAMJRGAYTCMBAGAYDCMJQGAYDAIBQGAYTCMBQGEYSAMBQGEYTAMBRGEQDAMBRGEYDCMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYTAMBREAYDAMJRGEYDAMBAGAYDCMJQGEYDAIBQGAYTCMBRGEYCAMBQGEYTAMBRGEQDAMBRGEYDAMJREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGAYCAMBQGEYTAMJRGEQDAMBRGEYDCMBQEAYDAMJRGAYDAMJAGAYDCMJQGEYTAIBQGAYTCMBQGAYSAMBQGEYTAMBQGEQDAMBRGEYDAMJQEAYDAMJQGAYDAMBAGAYDCMJRGAYDCIBQGAYTCMBRGAYSAMBQGEYTCMBQGAQDAMBRGEYDCMBQEAYDAMJRGAYDAMJAGAYDCMJQGAYTAIBQGAYTCMBQGAYCAMBQGEYTCMBQGAQDAMBRGEYDAMJREAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDAMJREAYDAMJRGAYTAMJAGAYDCMJQGEYTCIBQGAYTCMBRGEYCAMBQGEYTAMJRGAQDAMBRGEYDCMBQEAYDAMJQGAYDAMBAGAYDCMJRGAYDCIBQGAYTCMBRGAYSAMBQGEYTCMBQGEQDAMBRGEYDCMBQEAYDAMJRGAYTAMJAGAYDCMJQGEYDCIBQGAYTCMBQGEYCAMBQGEYTCMBQGAQDAMBRGEYDCMBREAYDAMJQGAYDAMBAGAYDCMJRGAYDAIBQGAYTCMBQGEYCAMBQGEYTAMJQGAQDAMBRGEYDAMBREAYDAMJRGEYDAMJAGAYDCMJQGEYDAIBQGAYTCMJQGAYCAMBQGEYTAMJRGAQDAMBRGEYDCMJREAYDAMJQGAYDAMBAGAYDCMJQGEYDCIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDCMBQEAYDAMJRGAYDCMBAGAYDCMJQGAYTAIBQGAYTCMBRGAYCAMBQGEYTAMBQGAQDAMBRGEYDAMBQEA

Answer 1

Cryptanalysis is the study and anlysis of crypto systems. You first need to identify possible cipher(s) which may have been used on this challenge.

Here's a page with a description of a few types of techniques you may want to read. It will give you an idea of common simple ciphers that would likely have been used.

Here's a page from the same site that talks about analyzing unknown ciphers.