These are the replays worth doing in GCC (Grasscover Camp) for grutin gold, which is the fastest way to earn it.

SCR (Scaredy-Cat Radar) Manic EP 4: 200 grutin gold, 72 energy consumption | Easy Pickings RPLY /4 from Miriam

SCR (Scaredy-Cat Radar) Manic EP 3: 200 grutin gold, 72 energy consumption | Cooking Apprenticeship RPLY/4 from Yumi, Infrastructure RPLY/4 from Betty

Carnivore Park Manic EP4: 240 grutin gold, 60 energy consumption | Habitat Study RPLY/3 from Lex, Conserve the Habitat RPLY/3 from Oden, Three Cheers for Protein RPLY/3 from Bamz

Carnivore Park Manic EP3: 150 grutin gold, 60 energy consumption | May Agony Be Eternal RPLY/3 from Betty

Meat Factory Manic EP4: 150 grutin gold, 60 energy consumption | Injection Research RPLY/3 from Lex

Meat Factory Hard EP1: 135 grutin gold, 48 energy consumption | Savior Instinct RPLY/3 from Sora, Eyes Closed and Through RPLY/3 from Maverick

Total Grutin Gold: 1075 / character / day
2 characters = 2150 grutin gold
3 characters = 3225 grutin gold
4 characters = 4300 grutin gold
5 characters = 5375 grutin gold
6 characters = 6450 grutin gold

Energy Needed / Character: 372 energy
NOTE: During weekends, energy consumption is cut in half, so only 186 energy would be needed during weekends.