URB_CONTROL in about gousb HOT 1 CLOSED

You're not expected to select and endpoint, just use the correct request type. Even better still, look at section 9.4 of the USB 2.0 spec ("Standard Device Requests"), it lists a set of common requests with their meaning. It's very likely most of these requests are related to things like e.g. selecting a configuration or selecting an alternate setting of an interface - in which case you should use the designated gousb functions (e.g. Device.Config or Config.Interface) rather than hand-crafting the control requests.

Background:
Whether the endpoint value will be IN (0x80) or OUT (0x00) depends on the type of the control request (i.e. rType) - bit 7 of rType indicates a write (0, OUT) or read (1, IN), see section 9.3 USB 2.0 spec.

Both endpoint values 0x80 and 0x00 refer to endpoint number 0, bit 7 only indicates the direction of communication, not the endpoint number as such, see 5.5.2 of the spec.

from gousb.