SNP-based heritability | Interpretting the output

Dear all, I run the method for estimating the SNP-based heritability. And I have some questions, I hope you can help me in the interpretation.

Using my data (four candidate SNPs), I obtained that the proportion of phenotypic variance explained by all SNPs of my "input" file is 18.5%. Is it correct my interpretation?
Also, I was not sure how to interprete the V(G), V(e) and V(p), May I say that:
- V(G) is the proportion of variance of the data explained by the SNPs?.
- V(e) variance explained by the covariables?
- V(e) variance explained by the phenotype?

I really appreciate some guidance.
Regards,

Code
gcta64 --reml --grm-gz input --pheno pheno.txt --reml-pred-rand --qcovar qcovar.txt --out variance

variance.hsq
Source Variance SE

V(G) 0.000925 0.000417
V(e) 0.004074 0.000420
Vp 0.005000 0.000190
V(G)/Vp 0.185045 0.082167
logL 3008.430
logL0 3006.097
LRT 4.666
df 1
Pval 0.01538
n 1407