Maintaining gains / Every other week

I'm divorced and have kids every other week. I love working out but I try to do it when they're not here so I can focus on spending time with them.

Can you maintain gains working out only every other week? I was used to working out 4-6 days a week before. I'm finding it's kind of tough to hit workouts 7 days in row, and then being off 7 days, and I'm not even sure that it's effective doing it that way.

Appreciate any insight on this.