Term 'Gurbilas' ?

What is the formal meaning of this term in the following expression appearing at the end of the article.

"1. Kuir Singh, Gurbilas Patshahl 10. Patiala, 1968"

To my understanding it appears to be Gurmukhi version of the Hindi term 'vilas' refering to 'Luxurious & Sinful Life Style'. Any thing better known to any GurMattia (TRUTHful Human being) Sajjan.

Look forward to the author or a GurMat Scholar to help please !

User:Mutia 10 Jan 07