I wish there was, but as EP says, its likely not worth it, at least for now. I personally would love having Touhou in GTA 4 however since you could go much higher in detail for the characters, plus the physics would be better for modding. Too bad Microsoft had to be a butthole and work as hard as they can to stop us from modding.
I'd also blame Rockstar. Granted, GFWL sucks terribly (which is why Fable 3, an MSFT-published product, is on Steam as well), but really we should blame Rockstar for not being friendly to the PC modding community with the use of patches that may have (slightly) improved performance but also forced the modders to create new loopholes to get things working. Plus it has always been favouring of consoles, and we don't know when or if RDR or LA Noire, let alone GTA V, will even arrive on PC.
As for GTA: SA, I have ideas to change the gang names too. Already changed player ranks to Tempest's custom ones, and for gangs I already have some ideas:
Grove St (yours) - Hakurei Shrine (mostly reskins and fairies)
Ballas (Orin, zombie fairies; main enemy) - Team (9) (Cirno, Rumia, Daiyousei chibi models?)
Vagos (hispanic enemies) - Tengu (Aya, Momi, Hatate - they're both in highlands)
Aztecas (Cesar, lowriders) - Yakumo Estate (or Moriya)
Triads (Chinese) - Moriya Shrine (or Yakumo / Satori)
Da Nang (Vietnamese, boat mission) - Netherworld + Higan (Yuyuko, Youmu, Shikieiki, Komachi - NICE BOAT)
Rifa (hispanics in San Fierro ) - Eientei (Eirin, Kaguya, Reisen, Tewi)
Mafia (some missions) - Scarlet Devil Mansion residents (Remi, Flan, Sakuya, Patchy?)