1) If there is a risk of women being only ‘formally’ among the target group members, consider rephrasing the indicator to, for example, “% of active individuals within [specify the target group] who are female”. Such an amendment might give you more meaningful data as you will measure the representation of women (or men) only among those target group members that are actually active. However, with this addition, it is important to define what is meant by ‘active’ and to keep strictly to this definition.
2) If you deal with a context where the objective is to increase the representation of men, rephrase the indicator to "% of [specify the target group] who are male" and revise the methodology accordingly.