Help with SIP to H.323 call and vice versa!

Good day, Currently running on asterisk Got this project to make H.323 and SIP call and vice versa, but i cant seems to find a guide around. Is it possible to do it?

install gnugk create h323 devices on gnugk . create a h323 trunk between gnugk and asterisk . sip devices on asterisk will be able to talk to h323 gnugk registered devices and h323 devices can talk to sip devices .