Green’s Dictionary of Slang

1. to confuse; to worry, to perturb.

1812		Spirit of Irish Wit 244: Mr. Syntax, who inclined a little to the clodpole, was gravelled for some moments.
1840		Flash Mirror 16: It seems to gravel you; now you’re a nice man, I don’t think,. my tulip.

2. (Aus.) to overcome, to beat (lit. or fig.).

1912

Sat. Referee (Sydney) 12 Oct. 4/6: Similarly the fact of having beaten an opponent can be described as [...] ‘gravelled him,’ ‘laid him out,’ ‘whacked him,’ ‘downed him’ [etc].