Says theres controller support, there isn't. If you consider just being able to get into the menu screen as playable, then its playable. Trying to start the game causes it to crash, if you're lucky enough to get past that then the game will be a stuttery screen tearing mess. The fact this is even being sold is an insult not only to the MGS fanchise but to GOG's storefront too.
MGS1 and MGS2 stand among my favourite games of all time, playing them back on the PS1 and PS2 is really an experience. HOWEVER these ports being sold through GOG are completely broken and need modding in order to work properly, even if you are willing to go through that process I'd still warn you to stay away from these ports and look elsewhere. While i don't condone piracy emulating is the way to go for these games dont be fooled into buying these blatant cash grabs.