Use this forum for technical support and general questions related to GEO my WP plugin and its core add-ons only. For technical support and general questions related to any of the premium extensions please open a new premium support ticket.
Keywords nor custom fields search are available with the free version. You can use some of GEO my WP hooks to code the features yourself ( require development skills ). Otherwise, you might want to checkout the Premium Settings extension, which provide both keywords and custom fields filters.