GIB (Genome Information Broker) provides an integrated search of Bacteria, Archaea, Eukaryota complete genome sequences.
New menu "List of gene name, GC %, and GC skew" was added to GIB chromosome and plasmid download site on Nov. 5. You can download GC % and GC skew of each gene at once.
Download menu also provides "Whole genome flat file (DDBJ or FASTA format)", "DNA sequences of all features (FASTA format)" and "Amino acid sequences of CDS (FASTA format)" etc. This menu appears in the left blue frame when the organism name was selected.