Goldfeld - Quandt test statistic equal to 1 I wonder what it means if the statistic (ratio) of this test is one?
The statistic is built from sample splitting. Then you have to calculate the ratio RSS2 / RSS1, which are the Residual Sum Squares of the new subsamples. 
I think it means that both subsamples have the same variance but I am not sure at all.
Thank you in advance.
The situation implicitly described in the question assumes that the two sub-samples have equal size (which is not necessary for the test to go through).  

In such a situation, if the ratio $RSS2/RSS1$ equals unity, then the null-hypothesis of homoskedasticity won't indeed be rejected for any significance level up to $0.5$, (to be compared to the conventional levels of $0.1,\; 0.05,\; 0.01$)  because the statistic used, under the null hypothesis follows an F-distribution (exactly or asymptotically), and more over, one that has equal degrees of freedom for the numerator and the denominator (due to the equal sub-sample sizes). 

This also makes intuitive sense: if the obtained estimates for the sub-sample variance are equal, then, in order to reject the null, we should accept that it would be more probable than not, that the rejection will be mistaken.