zawawa,
you have done a good job, but you must increase your dev-performance and communication.
SRB-Miner still have monero v7, light and heavy with good hashrates and fast updates... costs only 0.86% devfee (Ver.1.2.4 is devfee-free).
SRB-Miner overtakes your GGS

.
SRB-Miner has horrible hashrate on 280, 280X and 290 cards.
GGS needs crypto-heavy support now, when difficulty is low and profit is high.