let's get some facts cleared:
1. we've never seen m's condo
2. g supposedly has a roomie we don't know who
3. m was at home when visited g's condo n knew where things were kept
4. they both said they stay at their condos more
5. in conclusion they live in the same condo

mew said he was waiting for gulf and then when NO ONE even suspected that the con. could be a shortform for condominium gulf himself asked mew to clear up what he means by con. as if they would get caught or something

mew was eating a burger and some "friend" of gulf bought a hamburger for him which is in his fridge and mew knows about it when gulf forgot

M : As of lately, I stay at condo.
G : Lately, I rarely stay at home. I often stay at condo.

(trans. by @Kip_For_MewGulf)

just saying but this explanation was so suspicious
like i know they weren't together but it seemed like they are not together because they had to do live or something