I'm using gviz to plot genomic data like methylation data, snp data, etc ... Is it possible to plot also alignment data into a gviz plot ? I've to plot 30 alignments.
I'm unsure what you mean. Gzip is for compression, there is (to my knowledge) no gzip-plot, maybe you're thinking of gzippied gviz-files?
gviz no gzip ;)