All that can presently (June 2019) be gleaned from sheet music covers and by internet searching is that Gus. W. Bernard has 2 works published between 1897 and 1899.
Of ragtime interest is Colored Aristocracy (1899) published by The Groene Music Publisher's, Cincinnati, Ohio, USA.
Surfers are welcome to contribute information about this composer.
This list is arranged in chronological order and contains 2 works by Gus. W. Bernard.
It does not claim to be complete and represents only the number of items located. Keys:ER