The effort by financial technology provider GBST to prove some competition in the business of providing calculators for bank and other websites that work out loan repayment terms or measure savings plans may be showing signs of being viable.GBST yesterday reported revenue of $2.5 million for its financial services division for the year to June 2010, and double the revenue for 2009. The division, which is run by some former InfoChoice executives, generates less than four per cent of GBST's overall revenue.The firm said it signed 38 customers for website calculators.It's not clear how much of the $2.5 million relates to information products and databases since GBST includes revenue from web design and other services under this division. EBIDTA for 2009 was $31,000.While GBST recorded an increase in operating revenue across the group (up nine per cent to $68 million) and a rise in EBITDA (up 26 per cent to $17 million) the highlight of the firm's full year profit is an impairment charge of $5.5 million on financial models for the securities processing industry purchased from Coexis in late 2008. GBST said these models were "not as advanced as GBST was led to believe". GBST said it was considering its legal options.