The Gosper Curve is a FASS-curve which can be derived by a substitution tiling with one substitution rule and appropriate decorations.
The inflation factor $q$
is $sqrt(7)$
.
[gar1976]
Gardner, M
Mathematical Games
Scientific American
1976,
Volume 235, Issue 6,
124-133,
10.1038/scientificamerican1276-124