Afrikaans speaking people in
South Africa, like myself, use it as "gesellig". With a softer 's' sound.
Used in the same context and with the same meaning as gezellig.
For example:
"Ons kuier nou lekker gesellig."
Roughly translated:
"We are enjoying each other's company" (and the current mood)
Also linked with a desire not to part, or otherwise interrupt the conversation and atmosphere.
Really effective if used by somebody holding a cup of coffee.