He graduated from the Delhi School of Art in 1959 with a degree in Graphic Designing.
[1][2] He was a designer at the American Centre for twenty-nine years, creating posters for plays, films, dances, and workshops, both home-grown and foreign.
[3] He contributed cartoons and caricatures to the magazine Span and other publications, besides working as an illustrator.
[4] His short films, including Time (1973) and The End (1974) were shown in Lalit Kala Akademi's Art in Cinema programme[5] As a painter, Gajwani had numerous one-man shows at the Shridharani Art Gallery in New Delhi.
He also participated in over a hundred group shows in New Delhi and Mumbai, as well as countries outside India.