I want to offer my classes within a range of times if I am available with my synced Google calendar

Hello,

I would like to offer a 1 hour class (not explicitly) so that a client can sign up (and create the class if they are the first one to sign up for that time) if I have availability based on information taken from my synced google calendar. 

For example, I may have a one-on-one class appear on my calendar and I want squarespace to NOT offer availability if that time coincides with the other event. I also want squarespace to block off the availability on my google calendar if a client schedules a class so that nobody can schedule a one-on-one class at that same time. I can't seem to find an intuitive way of doing so. Please help. 

Essentially, I want to be available for group classes between 9am and 5pm but I don't want to allow a client to schedule an event if I am marked as "busy" from my google calendar event.