CBG dominance is only expressed in homozygous recessive Bo/Bo ‘allele’ combo at the THCAS/CBDAS linked region. Therefore, if the plants you used as parents were actually CBG dominant plants, then so are all of the offspring.
As far as compliance, that still depends on the residual THC level. Since there is no active CBDAS synthase to produce THC (CBDAS variants all produce some THCA, with mostly CBDA) I am not completely clear where the THC is coming from. Either non-enzymatic conversion from CBG or some other minor cannabinoid synthase gene (CBC maybe) also produces THC. Some CBG plants still have a CBG:THC ratio that means they can go hot as hemp.
The total THC limit for hemp in the United States is 0.03% according to the current USDA hemp interim rule.